How do I create a procmail recipe that will filter mail from user 1 to user 2 and send them to /dev/null, then send whatever remains to user 3?
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It sounds like this request wants to grab all messages that fit the from user 1 to user 2 criteria and send them to /dev/null, then send whatever remains to user 3. The below script should do that, as procmail generally stops at the first matching criteria, so it should grab user 1 to user 2 emails and kill them, failing that it will forward all mail to user 3.
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*^From.user1...
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